From 02c18c23d7eb8e520e8584af183ca9b67937d45d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Wed, 3 May 2017 17:21:46 +0200
Subject: vis: introduce count iterator to handle interrupted flag

---
 main.c |  6 ++++--
 vis.c  | 22 ++++++++++++++++++++++
 vis.h  | 10 ++++++++++
 3 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/main.c b/main.c
index b59dea3..63d796b 100644
--- a/main.c
+++ b/main.c
@@ -1241,7 +1241,8 @@ static const char *repeat(Vis *vis, const char *keys, const Arg *arg) {
 
 static const char *cursors_new(Vis *vis, const char *keys, const Arg *arg) {
 	View *view = vis_view(vis);
-	for (int count = vis_count_get_default(vis, 1); count > 0; count--) {
+	VisCountIterator it = vis_count_iterator_get(vis, 1);
+	while (vis_count_iterator_next(&it)) {
 		Cursor *cursor = NULL;
 		switch (arg->i) {
 		case -1:
@@ -1481,7 +1482,8 @@ static const char *cursors_navigate(Vis *vis, const char *keys, const Arg *arg)
 		return keys;
 	}
 	Cursor *c = view_cursors_primary_get(view);
-	for (int count = vis_count_get_default(vis, 1); count > 0; count--) {
+	VisCountIterator it = vis_count_iterator_get(vis, 1);
+	while (vis_count_iterator_next(&it)) {
 		if (arg->i > 0) {
 			c = view_cursors_next(c);
 			if (!c)
diff --git a/vis.c b/vis.c
index be12efb..bdee2e7 100644
--- a/vis.c
+++ b/vis.c
@@ -1545,6 +1545,28 @@ void vis_count_set(Vis *vis, int count) {
 	vis->action.count = (count >= 0 ? count : VIS_COUNT_UNKNOWN);
 }
 
+VisCountIterator vis_count_iterator_get(Vis *vis, int def) {
+	return (VisCountIterator) {
+		.vis = vis,
+		.iteration = 0,
+		.count = vis_count_get_default(vis, def),
+	};
+}
+
+VisCountIterator vis_count_iterator_init(Vis *vis, int count) {
+	return (VisCountIterator) {
+		.vis = vis,
+		.iteration = 0,
+		.count = count,
+	};
+}
+
+bool vis_count_iterator_next(VisCountIterator *it) {
+	if (it->vis->interrupted)
+		return false;
+	return it->iteration++ < it->count;
+}
+
 void vis_exit(Vis *vis, int status) {
 	vis->running = false;
 	vis->exit_status = status;
diff --git a/vis.h b/vis.h
index d64c877..62b207a 100644
--- a/vis.h
+++ b/vis.h
@@ -352,6 +352,16 @@ int vis_count_get(Vis*);
 int vis_count_get_default(Vis*, int def);
 void vis_count_set(Vis*, int count);
 
+typedef struct {
+	Vis *vis;
+	int iteration;
+	int count;
+} VisCountIterator;
+
+VisCountIterator vis_count_iterator_get(Vis*, int def);
+VisCountIterator vis_count_iterator_init(Vis*, int count);
+bool vis_count_iterator_next(VisCountIterator*);
+
 enum VisMotionType {
 	VIS_MOTIONTYPE_LINEWISE  = 1 << 0,
 	VIS_MOTIONTYPE_CHARWISE  = 1 << 1,
-- 
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